LOS ANGELES — Prince William and his wife Catherine will kick off their three-day visit to California on July 8, marking his first official trip to the Golden State and her first journey ever to the U.S. Having to go to everything from a business event featuring British and American venture capitalists to a red carpet soiree for BAFTA, a visit with inner-city artists and even a polo match, the royal couple clearly will need a diverse wardrobe. So WWD asked Angelenos what the Duke and Duchess of Cambridge should wear — as well as a few tips on what they might want to see if they have any spare time.